DX step by step (2) -- draw pipeline (T & L)

Transforming and lighting sounds like a process. Yes, it is a process that creates a 3D scene and a geometric description of the virtual camera, expressed in 2D on the display.

 

 

General steps for creating a pipeline:

Local Coordinate System (your own coordinate system) --> world coordinate system (scene Coordinate System) --> observation coordinate system (camera coordinate orientation transformation) --> background hiding --> illumination

--> Crop -- projection (n-dimensional transformation to n-1 dimension) --> window transformation --> Grating

 

 

 

Local Coordinate System to world coordinate system transformation: Device: settransform (d3dts_world, & worldmatrix );

World coordinate system to observe Coordinate System Changes: Device: settransform (d3dts_view, & viewmatrix );

Backend hiding: Device: setrenderstate (d3drs_currmode, value );

Illumination: IlluminationAlgorithmThe ray tracing algorithm is real-time and basically not used. It generally uses ambient light, mirror light, diffuse reflection light, and parallel light;

Crop: Remove invisible data;

Projection: the process of transforming n-1 dimensions from N-dimensional data. Here, it refers to the process of 3D transformation to 2D. device: settransform (d3dts_projection, & Pro );

Window conversion: Device: setviewport (& vp );

Raster: Use the coloring algorithm to calculate the color value of each pixel;